or dumping pickles with a 2.x-compatible protocol, in order to make data
sharing and migration easier. This behaviour can be disabled using the
new `fix_imports` optional argument.
svn+ssh://pythondev@svn.python.org/python/trunk
........
r72223 | antoine.pitrou | 2009-05-02 23:13:23 +0200 (sam., 02 mai 2009) | 5 lines
Isue #5084: unpickling now interns the attribute names of pickled objects,
saving memory and avoiding growth in size of subsequent pickles. Proposal
and original patch by Jake McGuire.
........
'L' opcode always appends an 'L' on output, just as 2.x does. When
unpickling, remove the trailing 'L' (if present) before passing the
result to PyLong_FromString.
Updated documentation.
Merged revisions 63042 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
........
r63042 | alexandre.vassalotti | 2008-05-11 04:25:28 -0400 (Sun, 11 May 2008) | 5 lines
Added module stub for copy_reg renaming in 3.0.
Renamed copy_reg to copyreg in the standard library, to avoid
spurious warnings and ease later merging to py3k branch. Public
documentation remains intact.
........
memoryview objects have a different API (such as for indexing) than
bytes and bytesarray objects, so memoryview objects shouldn't be
treated blindly as "bytes" objects.
for bytes. This is the default protocol. It intentionally cannot
be unpickled by Python 2.x.
- When a pickle written by Python 2.x contains an (8-bit) str
instance, this is now decoded to a (Unicode) str instance. The
encoding used to do this defaults to ASCII, but can be overridden
via two new keyword arguments to the Unpickler class. Previously
this would create bytes instances, which is usually wrong: str
instances are often used to pickle attribute names etc., and text is
more common than binary data anyway.
No detailed change log; just check out the change log for the py3k-pep3137
branch. The most obvious changes:
- str8 renamed to bytes (PyString at the C level);
- bytes renamed to buffer (PyBytes at the C level);
- PyString and PyUnicode are no longer compatible.
I.e. we now have an immutable bytes type and a mutable bytes type.
The behavior of PyString was modified quite a bit, to make it more
bytes-like. Some changes are still on the to-do list.
strings, in Latin-1. Bytes are once more pickled through bytes.__reduce__,
but now it returns "latin-1" as the second parameter.
Unfortunately this breaks datetime pickling. I'll have to investigate
further; reverting Martin's changes doesn't seem to help.
's' and 'c' codes.
Change pickle to dump bytes objects using the 'S'
code, and to load the 'S' code as byte objects.
Change datetime and array to generate and expect
bytes objects in reduce/unreduce.
base64, uu, zlib, rot_13, hex, quopri, bz2, string_escape.
However codecs.escape_encode() and codecs.escape_decode()
still exist, as they are used for pickling str8 objects
(so those two functions can go, when the str8 type is removed).
Alexandre Vassalotti
Antoine Pitrou
Łukasz Langa
Florent Xicluna
Benjamin Peterson
Alexander Belopolsky
Victor Stinner
Mark Dickinson
Hirokazu Yamamoto
Guido van Rossum
Martin v. Löwis
Walter Dörwald